What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Technology Comparison

Vercel Image vs Bootstrap

Side-by-side comparison based on real-world adoption data from 1,909 detections across analyzed websites.

Market Share Distribution

Vercel Image (18%)Bootstrap (82%)

Total Detections

335

Vercel Image

1,574

Bootstrap

HIGHER

Websites Using

335

Vercel Image

1,574

Bootstrap

HIGHER

Used Together

websites use both

1% OVERLAP

Vercel Image

UI Libraries

335 detections

335 sites

Visit Website View Profile

Bootstrap

UI Libraries

World's most popular CSS framework with pre-built responsive components, grid system, and JavaScript plugins. Created by Twitter.

1,574 detections

1574 sites

Visit Website View Profile

Our Analysis

Bootstrap is significantly more popular than Vercel Image in our dataset, appearing on 1574 websites compared to 335. 12 websites use both technologies together (1% overlap). Both are in the UI Libraries category, making them direct alternatives.

Frequently Asked Questions

What is the difference between Vercel Image and Bootstrap?

Vercel Image is an open-source React component and Next.js Image component optimization for modern web development. It automatically optimizes images for faster loading times and improved user experience, supporting modern formats like WebP and AVIF. World's most popular CSS framework with pre-built responsive components, grid system, and JavaScript plugins. Created by Twitter. Both belong to the UI Libraries category, making them direct alternatives.

Which is more popular, Vercel Image or Bootstrap?

Based on our analysis of real websites, Bootstrap is more widely adopted with 1,574 detections compared to Vercel Image's 335.

Can Vercel Image and Bootstrap be used together?

Yes! We've detected 12 websites that use both Vercel Image and Bootstrap together, showing they can complement each other in certain setups.

Check Any Website's Technology Stack

Find out if a website uses Vercel Image, Bootstrap, or any other technology.

Analyze a Website

More Comparisons

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Vercel Image vs Bootstrap

Market Share Distribution

Vercel Image

Bootstrap

Our Analysis

Sites Using Both (12)

Only Vercel Image

Only Bootstrap

Frequently Asked Questions

What is the difference between Vercel Image and Bootstrap?

Which is more popular, Vercel Image or Bootstrap?

Can Vercel Image and Bootstrap be used together?

Check Any Website's Technology Stack

More Comparisons